Related Experiment Video
Updated: Jul 29, 2025
04:23
The Creation of a Rat Model for Osteosarcopenia via Ovariectomy
Published on: February 21, 2025
428
COVID-19 and sarcopenia-related traits: a bidirectional Mendelian randomization study
Chao Liu1,2, Ningyuan Liu1, Yi Zeng1,2
1Department of Orthopedics, the Second Xiangya Hospital of Central South University, Changsha, China.
Frontiers in Endocrinology
|May 26, 2023
Summary
This study investigated the causal link between coronavirus disease 2019 (COVID-19) and sarcopenia (SP). Findings suggest an indirect interaction, not a direct causal relationship, between COVID-19 and SP-related traits.
Area of Science:
- Genetics
- Epidemiology
- Gerontology
Background:
- Coronavirus disease 2019 (COVID-19) is linked to skeletal muscle loss and sarcopenia (SP).
- Sarcopenia is associated with increased COVID-19 susceptibility, hospitalization, and severity.
- A causal relationship between COVID-19 and sarcopenia-related traits remains unclear.
Purpose of the Study:
- To investigate the potential causal relationship between COVID-19 and sarcopenia-related traits using Mendelian randomization.
- To clarify the interaction between COVID-19 and sarcopenia.
Main Methods:
- Utilized Mendelian randomization (MR) analysis.
- Extracted data from the COVID-19 Host Genetic Initiative and UK Biobank without sample overlap.
- Employed multiple MR methods (IVW, weighted median, MR-Egger, RAPS, CAUSE, MR-APSS) and sensitivity analyses (MR-Egger intercept, Cochran's Q, MR-PRESSO) to assess causality and pleiotropy.
Main Results:
- The MR-APSS method, after Bonferroni correction, did not provide sufficient evidence for a direct causal relationship between COVID-19 and sarcopenia-related traits.
- Most other MR analyses were nominally consistent with the MR-APSS findings, indicating a lack of strong direct causality.
Conclusions:
- The study suggests an indirect interaction between COVID-19 and sarcopenia-related traits rather than a direct causal link.
- Older adults are advised to focus on adequate nutrition and exercise to manage sarcopenia during the COVID-19 pandemic.
Related Concept Videos
01:05Single Nucleotide Polymorphisms-SNPs
15.3K
A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
15.3K
01:29Bias in Epidemiological Studies
391
Biases can arise at various stages of research, from study design and data collection to analysis and interpretation. Recognizing and addressing these biases is essential to ensure the validity and reliability of epidemiological findings.Broadly speaking, biases in epidemiology fall into three main categories: selection bias, information bias, and confounding. A more detailed description of possible biases is:
391
01:33Pleiotropy
40.7K
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
40.7K
01:03Rous Sarcoma Virus (RSV) and Cancer
5.2K
Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
5.2K
01:18Polygenic Traits
66.1K
When more than one gene is responsible for a given phenotype, the trait is considered polygenic. Human height is a polygenic trait. Studies have uncovered hundreds of loci that influence height, and there are believed to be many more. Due to the high number of genes involved, as well as environmental and nutritional factors, height varies significantly within a given population. The distribution of height forms a bell-shaped curve, with relatively few individuals in the population at the...
66.1K
01:20Study Designs in Epidemiology
292
Epidemiological study designs are fundamental tools for investigating the distribution, determinants, and control of health conditions in populations. They help researchers understand the relationships between exposures and outcomes, and they broadly fall into two categories: "observational" and "experimental" studies.
Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and...
Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and...
292